VAMP 260 Power monitoring unit
Technical description
VAMP Ltd
30
Vamp 24h support phone : +358 (0)20 753 3264
VM260.EN004
4.2. Auxiliary voltage
The external auxiliary voltage Uaux (standard 40…260 V ac or
dc) for the unit is connected to the terminals X3: 17-18.
Note!
Polarity of the auxiliary voltage Uaux (24 V dc, option B):
- = X3:17 and + = X3:18.
4.3. Output relays
The power-monitoring unit is equipped with seven (five)
configurable output relays and a separate output relay for the
self-supervision system.
• Trip relays T1 and T2 (terminals X3: 14-15 and 12-13)
• Alarm relays A1 - A5 (terminals X3: 9-11, X2: 13-15, 10-12,
7-8, 5-6)
• In the mA version of the PMU the alarm relays A4
(X2:7-8) and A5 (X2:5-6) are excluded.
• Self-supervision system output relay IF (terminals X2: 16-
18)
4.4. Serial communication connection
• X4: RS 232 serial communication connection for computers,
connector LOCAL (RS 232), connectors on front panel and
rear panel connected in parallel, see Figure 4-1.
• X5: Remote control connection, connector REMOTE (TTL)
on the rear panel of the unit, see Figure 4-1.
4.5. Analogue outputs (option)
A terminal with the mA option has four configurable analogue
outputs that take up two of the output relays (A4 and A5).
Thus, a relay with the mA option has two output relays less
than the version without mA option.
The resolution of the analogue output is 12 bits resulting
current steps less than 6 µA. The output current range is
configurable allowing e.g. the following ranges: 0 .. 20 mA and 4
.. 20 mA. More exotic ranges like 0 … 5 mA or 10 … 2 mA can
be config-ured freely as long as the boundary values are within
0 … 20 mA.
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